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Electrical Energy and Power for NEET: 31 solved questions

Real NEET paper questions on electrical energy and power, part of current electricity. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 1989 to 2019. No sign-in needed to read them.

What this topic asks

• Heating and power in resistors — 13 questions
• Rated bulbs and appliances — 12 questions
• Fuse and circuit protection — 3 questions
• Maximum power transfer — 2 questions
• Units of electrical energy — 1 question

All 31 questions with solutions

• Which of the following acts as a circuit protection device? NEET 2019
• The charge flowing through a resistance R varies with time t as Q = at - bt², where a and b are positive cons… NEET-I 2016
• Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires. The f… CBSE AIPMT 2014
• If voltage across a bulb rated 220 volt-100 watt drops by 2.5% of its rated value, the percentage of the rate… CBSE AIPMT 2012
• An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperat… CBSE AIPMT 2008
• A 5 ampere fuse wire can withstand a maximum power of 1 watt in the circuit. The resistance of the fuse wire… CBSE AIPMT 2005
• In India electricity is supplied for domestic use at 220 V. It is supplied at 110 V in USA. If the resistance… CBSE AIPMT 2004
• Fuse wire is a wire of CBSE AIPMT 2003
• Two bulbs are of (40 W, 200 V) and (100 W, 200 V). Then the correct relation for their resistances is CBSE AIPMT 2000
• A 5°C rise in temperature is observed in a conductor by passing a current. When the current is doubled, the r… CBSE AIPMT 1998
• A (100 W, 200 V) bulb is connected to a 160 volt supply. The power consumption would be CBSE AIPMT 1997
• One kilowatt hour is equal to CBSE AIPMT 1997
• A 4 μF capacitor is charged to 400 V. If its plates are joined through a resistance of 2 kΩ, then the heat pr… CBSE AIPMT 1995
• An electric bulb is rated 60 W, 220 V. The resistance of its filament is CBSE AIPMT 1994
• A current of 2 A, passing through a conductor, produces 80 J of heat in 10 seconds. The resistance of the con… CBSE AIPMT 1989
• Six similar bulbs are connected as shown in the figure with a DC source of emf E and zero internal resistance… NEET 2019
• A filament bulb (500 W, 100 V) is to be used in a 230 V main supply. When a resistance R is connected in seri… NEET-II 2016
• The power dissipated in the circuit shown in the figure is 30 watts. The value of R is CBSE AIPMT 2012 Mains
• If the power dissipated in the 9 Ω resistor in the circuit shown is 36 watt, the potential difference across… CBSE AIPMT 2011
• A current of 3 amp flows through the 2 Ω resistor shown in the circuit. The power dissipated in the 5 Ω resis… CBSE AIPMT 2008
• The total power dissipated in watt in the circuit shown here is CBSE AIPMT 2007
• Power dissipated across the 8 Ω resistor in the circuit shown here is 2 watt. The power dissipated in watt un… CBSE AIPMT 2006
• When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the powe… CBSE AIPMT 2004
• Two 220 volt, 100 watt bulbs are connected first in series and then in parallel. Each time the combination is… CBSE AIPMT 2003
• An electric kettle has two heating coils. When one of the coils is connected to an a.c. source, the water in… CBSE AIPMT 2003
• Three equal resistors connected in series across a source of e.m.f. together dissipate 10 watt of power. What… CBSE AIPMT 1998
• If two bulbs, whose resistances are in the ratio of 1:2 are connected in series, the power dissipated in them… CBSE AIPMT 1997
• A heating coil is labelled 100 W, 220 V. The coil is cut in half and the two pieces are joined in parallel to… CBSE AIPMT 1995
• 40 electric bulbs are connected in series across a 220 V supply. After one bulb is fused the remaining 39 are… CBSE AIPMT 1989
• A battery of e.m.f 10 V and internal resistance 0.5 Ω is connected across a variable resistance R. The value… CBSE AIPMT 1992
• Two identical batteries each of e.m.f 2 V and internal resistance 1 Ω are available to produce heat in an ext… CBSE AIPMT 1990